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INDONESIA
Jurnal Kimia Terapan Indonesia
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : 08532788     EISSN : 25277669     DOI : -
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology
Arjuna Subject : -
Articles 283 Documents
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SINTESIS DAN KARAKTERISASI NANOFIBER KOMPOSIT Zn-PVDF KOPOLIMER Yelfira Sari; Muhamad Nasir; Chandra Risdian; Syukri Syukri
Jurnal Kimia Terapan Indonesia Vol 16, No 1 (2014)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1669.821 KB) | DOI: 10.14203/jkti.v16i1.1

Abstract

Sintesis nanofiber komposit Zn-PVDF kopolimer dengan metoda elektrospinning telah berhasil dilakukan. Proses pembuatan nanofiber komposit serta  morfologi yang terbentuk dipengaruhi oleh penambahan Zn-asetat dengan perubahan diameter rata-rata serat dari 357,13 nm menjadi 777,24 nm. Analisis FTIR menunjukkan bahwa struktur kristal nanofiber komposit Zn-PVDF kopolimer didominasi oleh strukturβ-phase, dengan bilangan gelombang 1190,08 cm-1 dan 487,99 cm-1 untuk struktur α-phase dan 1404,18 cm-1; 1280,73 cm-1; 1074,35 cm-1; 881,47 cm-1; dan 840,96 cm-1 untuk struktur β-phase.Kata kunci :nanofiber komposit, Zn-PVDF kopolimer komposit, elektrospinning,kristal struktur, morfologi, diameter fiber The fabrication of Zn-PVDF copolymer nanofiber composite has been investigated in this research study by using electrospinning method. Fabrication and morphology of nanofiber composite is influenced by the addition of Zn-acetate. The average diameter of nanofiber composites increase with an addition of Zn-acetate, from 357,13 to 777,24nm. FTIRanalysisshowedthat thecrystalstructure ofPVDFnanofiberis dominatedby β-phase , thewave number 1190,08 cm-1 and 487,99 cm-1 for α-phase structure and 1404,18cm-1; 1280,73cm-1; 1074,35cm-1; 881,47cm-1and840,96cm-1 for β-phase structure respectively.Key words : nanofiber composite, Zn-PVDF copolymer composite, electrospinning, crystal structure,  morphology, fiber diameter
SIMULASI PROSES STERILISASI PADA GUDEG KALENG DENGAN MENGGUNAKAN COMPUTATIONAL FLUID DYNAMIC (CFD) Asep Nurhikmat; Bandul Suratmo; Nursigit Bintoro; Suharwadji Suharwadji
Jurnal Kimia Terapan Indonesia Vol 16, No 2 (2014)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1512.978 KB) | DOI: 10.14203/jkti.v16i2.10

Abstract

Telah dilakukan studi penggunaan computational fluid dynamic (CFD) pada proses sterilisasi gudeg kalengan. Penelitian bertujuan untuk mengetahui phenomena pindah panas konduksi gudeg kalengan selama proses sterilisasi. Bahan gudeg kalengan terdiri dari beberapa komponen penyusun diantaranya gudeg nangka, telur, daging ayam, kacang dan krecek kulit. Setelah ditutup gudeg kaleng disterilkan dengan beberapa variasi suhu (111; 121 dan 131oC) dan beberapa waktu setrilisasi (10; 20 dan 30 menit). Riwayat suhu selama sterilisasi direkam dengan data logger. Simulasi menggunakan program COMSOL versi 4.1. Hasil simulasi didapatkan terjadi sedikit perubahan titik dingin (cold spot) gudeg kalengan karena komposisi gudeg kalengan terdiri dari beberapa macam komponen penyusun dengan sifat fisik bahan yang berbeda-beda. Difusivitas masing-masing penyusun adalah gudeg 1,73E-04 m2/s; daging ayam 9.219E-05 m2/s; kacang tolo 1,98E-04 m2/s; putih telur 2,34E-04 m2/s; dan kuning telur 1,86E-04 m2/s. Perbandingan data observasi dengan data prediksi cukup baik dengan nilai koefisien regresi antara 0,964 sampai 0,998.Kata kunci: Computational fluid dynamic, CFD, Sterilisasi, Pengalengan, Gudeg kaleng. Have done studies used of computational fluid dynamic (CFD) in the sterilization process of gudeg canned. The study aims to determine the conduction heat transfer phenomena gudeg canned during the sterilization process. The study used some material namely young jackfruit, eggs, chicken, tolo beans and krecek cowhide. After closed, gudeg canned sterilized with some variation in temperature (111; 121 and 131oC) and some time sterilization (10; 20 and 30 minutes). History temperature during sterilization recorded with the data logger. Simulation studies used COMSOL program version 4.1. The simulation results obtained there was little change point cold spots from gudeg canned caused composition of gudeg canned have different physical properties. Diffusivity of each constituent is gudeg 1,73 E - 04 m2/s; chicken 9.219E - 05 m2/s; tolo beans 1.98 E - 04 m2/s; egg whites 2,34 E - 04 m2/s; and egg yolks 1.86 E - 04 m2/s. Comparison of predictions data with observed data quite well with the regression coefficient 0,964 to 0,998.Keywords: Computational fluid dynamics, CFD, sterilization, canning, canned gudeg
PENGEMBANGAN DAN VALIDASI METODE KROMATOGRAFI LAPIS TIPIS DENSITOMETRI UNTUK PENETAPAN KADAR TEOFILIN DAN EFEDRIN HIDROKLORIDA SECARA SIMULTAN PADA SEDIAAN TABLET Lestyo Wulandari; Yuni Retnaningtyas; Diyanul Mustafidah
Jurnal Kimia Terapan Indonesia Vol 15, No 1 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4325.02 KB) | DOI: 10.14203/jkti.v15i1.100

Abstract

The combination of Theophylline and Ephedrine isoften used to induce an additive effect in alleviating thesymptoms of respiratory disorders. This research is aimed todevelop a Thin Layer Chromatography (TLC) densitometrymethodfor the simultaneous determination of Theophyllineand Ephedrine hydrochloride in tablet dosage form. Themethod employed TLC aluminium plates precoated withsilica gel 60F254 as the stationary phase and the mixture ofethyl acetate: glacial acetic acid: aquabidest (11: 5 : 1 v/v)asthe eluen system. For detection of Ephedrinehydrochloride, the TLC plate must be re-eluted with 0,5%ninhydrin solution in aquabidest, and then heated at 105°Cfor 15 min. Quantitative evaluation was performed bymeasuring the absorbance-reflectance of the analyte spot at279 nm and 505 nm for Theophylline and Ephedrinehydrochloride, respectively. validation of the method showthat TLC Densitometryis selective and specific,showed agood linearity, precise, and accurate and can be used forroutine analysis of tablet in industrial quality controllaboratories.Keywords:TLCDensitometryV, alidationT, heophyllineE, phedrinehydrochloride
SITOTOKSISITAS XANTHORRHIZOL dari MINYAK ATSIRI RIMPANG Curcuma xanthorrhizaRoxb. terhadap SEL KANKER PAYUDARA YBM-1 Zalinar Udin
Jurnal Kimia Terapan Indonesia Vol 15, No 1 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4649.3 KB) | DOI: 10.14203/jkti.v15i1.101

Abstract

Curcuma xanthorrhiza Roxb. (temulawak) known hascytotoxic activity against cancel cells. The active compoundofCurcuma xanthorrhizaRoxb., for several cancer cells isxanthorrhizole. This research would assay the cytotoxicactivity of volatile oil from Curcuma xanthorrhizaRoxb. 'srhizome toward YMB-1 breast cancer cell. The method wasdone by in-vitro with alamar blue dyed, and measuredtheabsorbance to observe the viability (%) of cell and IC,ovalue. Xanthorrhizole used in this research was isolate fromethyl acetate fraction of Curcuma xanthorrhizaRoxb. 'srhizome compared the result with pure xanthorrhizol . Thecytotoxic activity assay toward YMB-1 cell showed thatxantorrhizole has highest activity with ICso 2.88 glmL,followed by the volatile oil with IC,o 3.20 glmL.lt meansthatactivity of volatile oil was not significantly different comparedwith that of xanthorrhizole . The lowest activity was found onisolate C27 with ICso 4.80 g/ml, while antimycin as positivecontrol gave IC,o 1.03 glmL..Keywords: Curcumaxanthorrhiza Roxb., volatile oil,xanthorrhizol,breast cancer,YMB-1cell, alamar blue method
DOCKING MOLEKUL DENGAN METODA MOLEGRO VIRTUAL DOCKER DARI EKSTRAK AIR Psidium guajava, Linn DAN Citrus sinensis, Peels SEBAGAI INHIBITOR PADA TIROSINASE UNTUK PEMUTIH KULIT Ayik Rosita Puspaningtyas
Jurnal Kimia Terapan Indonesia Vol 15, No 1 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6980.057 KB) | DOI: 10.14203/jkti.v15i1.102

Abstract

We have been molecular docking using MolegroVirtual Docker (MVD) on water extract of guava fruit(Psidiumguajava, Linn) and sweet orange (Citrussinensis,Peels) as inhibitor on enzyme tyrosinase withascorbic acid (vitamin C) as positive control to studywhitening agent. Based on the previous studies, the maincontent of the water extract of guava fruit (Psidiumguajava)are 2,6-dihydroxy-3,5-dimethyl-4-0--D-glucopyranosilbenzophenone, 3-hydroxy-2-butanone, and vitamin C, whilethe extract juice of sweet oranges (Citrus sinensis) arelimonene, linalol, and vitamin C. In this study the resultsshowed that the main content of the water extract of Psidiumguajava fruit have better bond as inhibitor on tyrosinase thanCitrus sinensis and vitamin C which can be seen fromMoldock score of Psidiumguajava (-107.806) and Citrussinensis (-76,9593); it meanslower the energyand morestable binding. The IC50 on water extract of guava fruit(psidiumguajava) and sweet orange (Citrus sinensis) were0.26 mM and 31.07 mM, respectively. The hydrogen bonds of2, 6-dihydroxy-3, 5-dimethyl-4-0--D- glucopyranosilbenzophenone with 5amino acid of tyrosinase were Gly 200,Pro 201 , Gly 196, Phe 197, and Asn 205, while limonen,linalool binding 3 amino acids were Gly 200, Phe 197, andAsn 205. Finally, 3D MVD visualization between maincontent of guava and sweet orange water extract can beconcluded that interaction of guava fruit (psidiumguajava)water extract against tyrosinase was more harmonious andstabil than vitamin C and main content of sweet orange(Citrus sinensis) water extract.Keywords: Psidium guajava, Citrus sinensis, tyrosinase, vitamin Cand docking molecule
APLlKASI KALSIUM KLORIDA DAN ETHEPHON DALAM UPAYA PENINGKATAN KUALITAS BUAH NANAS (Ananas comosus (L) Merr) Nungki Kusuma Astuti; Moch Dawam Maghfoer; Roedy Soelistyono
Jurnal Kimia Terapan Indonesia Vol 15, No 1 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5521.557 KB) | DOI: 10.14203/jkti.v15i1.103

Abstract

The objective of research was to obtain the treatmenttime of CaCl2 applications, dosage of CaCl2 and ethephonapplications to improve the fruit quality of pineapple. Thisresearch used Split-Split Plot Design and each treatmentreplicated 3times. The main plot is time ofCaCl2 applicationsthat consists of three levels, those are 90 day after flowering(daf), 120 daf and twice of CaCl2 applications at 90 and 120daf The sub plot is dosage of CaCl2 that consists of threelevels, those are 50 kg ha', 75 kg ha' and 100 kg ha', The subsub plot is dosage of ethephon that consists of two levels,those areO L ha' and 2,5 L ha', The results showed that thecombined treatment ofCaCl2 application on 90 daf, dosage ofCaCl250 kg ha' and dosage of ethephon 2.5 L ha' producedistribution external fruit maturity level of 25% and 50%higher than the other treatments. Combined treatment twiceof CaCl2 application on 90 and 120 daf with dosage of CaCl2100 kg ha' produces calcium content higher than the othertreatment and produce fruit texture, percentage of fruitdiseases and percentage of fruit bruised lower than othertreatments. Ethephon application had noeffect on calciumcontent but decreasing fruit texture, percentage of fruitdiseases and improved percentage offruit bruised. CaCl2 andethephonapplications didnot affect the total soluble solid,total acidity and vitamin C. .Keywords: CaCl2, ethephon, pineapple, fruit quality.
UJI KINERJA KATALIS Cu-ZnO/AI2O3 YANG DIPREPARASI DENGAN METODE KOPRESIPITASI UNTUK KONVERSI GLISEROL MENJADI PROPANADIOL R. Sarwono; K. C. Sembiring; D. S. Kusuma; S. Tursiloadi
Jurnal Kimia Terapan Indonesia Vol 15, No 1 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4605.799 KB) | DOI: 10.14203/jkti.v15i1.104

Abstract

Glycerolis the side product of esterificationprocess of edible oil into ester which is called as biodiesel. Conversion of glycerol into propanediol (PDO) involved many steps of reactions. Dehydration of Glycerol to 3- hydroxypropanalisstarted by breaking c-o bond, continued by hydrogenation reaction of 3-hydroxypropanal to produce 1,3-PDO. If the dehydration result of glycerol is acetol, the hydrogenation of acetol will produce 1,2-PDo. The dehydration reaction is depend on the strength of catalyst acidity or metalion Cu;itwill enhance the reactionselectivity toproduce 1,2 or 1,3-PDO. The strength ofCu-ZnO/A1203 catalyst prepared by coprecipitation method is 2.8 mmollgram. The glycerol conversion is almost 100% with 1,2-PDO as the main product and no 1,3-PDO wasobtained.Keywords: glicerol, co-precipitaion, catalyst, dehydration,PDO
SINTESIS DAN KARAKTERISASI NANOKOMPOSIT KONDUKTIF NANOFIBER Muhamad Nasir
Jurnal Kimia Terapan Indonesia Vol 15, No 1 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jkti.v15i1.105

Abstract

Conductive composite polyanilinelPVDF nanofiberhas been synthesized by using co-axial electro spinning.Morphology and diameter of nanofiber was influenced byPVDF polymer concentration and the type of solvent. Beadednanofiberwas formed at lower polymer concentration. On thecontrary, free beaded nanofiber was formed at higherpolymer concentration. Result of FTIR analysis showed thatPVDF crystal structure was dominant by p-phase crystalstructure. Conductive composite nanofiber has potentialapplication in sensor, actuator and airfilter.Keywords: Conductive composite nanofiber, co-axialelectrospinning, polyaniline/pvdf compositenanofiber
POTENSI TEMPE PASTA STERIL IRADIASI SEBAGAI NUTRISI ENTERAL PASIEN YANG MENGGUNAKAN ALAT BANTU NASO GASTRIC TUBE (NGT) Zubaidah Irawati; R. S. Adji Koesoemowidodo; Ades Puspita; Swasono R Tamat
Jurnal Kimia Terapan Indonesia Vol 15, No 2 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6133.892 KB) | DOI: 10.14203/jkti.v15i2.106

Abstract

Food irradiation process has a potential topromote of a safe, adequate and nutritiousfood supply for hospital diets. It has twoapplications that can contribute to thehealth and well being of humanity, i.e. theelimination of foodborne pathogensmicroorganisms, and the preservation offoods by the destruction of pests. Effects ofionizing radiation on tempe pasta selectedas samples for patient food intake throughNaso Gastric Tube (NGT) has beenstudied. Tempe pasta was vacuum packedin a laminate pouch of po lyesteraluminumfoil- linear low densitypolyethylene and gamma irradiated atdoses of 10 kGy and 25 kGy , respectivelyunder cryogenic condition and then storedat room temperature for 6 and 12weeks. Some quality parameters wereobserved. There was no significantdifferences between un irradiated andirradiated tempe pasta on the moisturecontent, pH, protein content and viscosity.Meanwhile isojlavon genestein contentand antioxidant capacity showed anincrease by increasing irradiation dose upto 12 weeks of storage. Malonaldehydecontent in tempe pasta was accelerating byincreasing the irradiation dose andextending the storage period but Peroxidevalue was not detected in all treatedsamples. The irradiated tempe pasta atcertain degree of viscosity and particlesize could be considered as protein basefood intake for immunocompromisedpatients through Naso Gastric Tube(NGT).Keywords: Tempe pasta, food irradiation,isojlavon genestine, nutritious food,immunocompromised patients.
PREPARASI PEREAKSI KIT IMMUNORADIOMETRlCASSAY FREE PROSTATE SPECIFIC ANTIGEN UNTUK DETEKSI KANKER PROSTAT Puji Widayati; Gina Mondrida; Sri Setiyowati; Agus Ariyanto; V. Yulianti Susilo; Wening Lestari
Jurnal Kimia Terapan Indonesia Vol 15, No 2 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5744.033 KB) | DOI: 10.14203/jkti.v15i2.107

Abstract

Prostate Specific Antigen (PSA) is a glycoprotein with a molecular weight of approximately 34,000 daltons serine protease secreted exclusively by prostatic epithelial cells that lining acini and prostate gland. Increased of PSA levels can be caused by prostate cancer or benign prostate enlargement (benign prostatic hyperplasia, BPH). PSA in the blood was found in the free condition (free PSA) and most of the bound protein (complexed-PSA, c-PSA). Measuring levels of PSA was found in the blood can be done by several methods such as by immunoradiometricassay (IRMA) methods or ELISA methods. IRMA method is one of immunoassay techniques using radionuclides ,/' 125 oJ I as a tracer, so the sample in small 13 quantity can be detected The purpose of this study was obtained PSA reagent kit that includes 1251labeled PSA as a tracer, PSA coated tube and PSA standard that requirements of the kit, then it can be optimized assay design, that eventually PSA reagent kit can be used for early detection of prostate cancer. It has been done labeling of Mab PSA using 125 1with reaction time was 90 seconds, amount of PSA MAb was 75 ugram and the activity of Na_ 125I was 1000 flCi. Preaparation of PSA coated tube using 0.05 M Na2C03 solution, at pH: 9.6 with volume was 250 ml., standard PSA with 0.025 Mphosphate buffer at pH 7.4 containing 5% BSA and 0.1% NaN3, and resulting at 1,25% and 14,12% respectively of NSB and BIT that requirement of the kit.Keywords: Prostate cancer, PSA, IRMA,NSB, Maximum Binding

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